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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 566 · 40 questions
TalentJR

How it works (Round and adjust): Round up: 49 is 50 − 1, 98 is 100 − 2. Multiply by the round number. Take away the number times the bit you added.

NameDateTime takenScore ___ / 40
  1. 1.9 × 49 =
  2. 2.15 × 29 =
  3. 3.4 × 98 =
  4. 4.10 × 49 =
  5. 5.5 × 29 =
  6. 6.5 × 49 =
  7. 7.9 × 49 =
  8. 8.14 × 19 =
  9. 9.3 × 19 =
  10. 10.3 × 9 =
  11. 11.9 × 9 =
  12. 12.14 × 19 =
  13. 13.8 × 49 =
  14. 14.4 × 49 =
  15. 15.9 × 29 =
  16. 16.28 × 98 =
  17. 17.12 × 19 =
  18. 18.12 × 19 =
  19. 19.3 × 29 =
  20. 20.7 × 9 =
  21. 21.3 × 29 =
  22. 22.10 × 9 =
  23. 23.4 × 19 =
  24. 24.3 × 9 =
  25. 25.3 × 9 =
  26. 26.10 × 9 =
  27. 27.3 × 99 =
  28. 28.39 × 99 =
  29. 29.8 × 9 =
  30. 30.11 × 9 =
  31. 31.33 × 98 =
  32. 32.3 × 9 =
  33. 33.8 × 29 =
  34. 34.12 × 29 =
  35. 35.34 × 98 =
  36. 36.5 × 49 =
  37. 37.9 × 49 =
  38. 38.7 × 9 =
  39. 39.9 × 49 =
  40. 40.12 × 19 =

Answer key

  1. 441
  2. 435
  3. 392
  4. 490
  5. 145
  6. 245
  7. 441
  8. 266
  9. 57
  10. 27
  11. 81
  12. 266
  13. 392
  14. 196
  15. 261
  16. 2744
  17. 228
  18. 228
  19. 87
  20. 63
  21. 87
  22. 90
  23. 76
  24. 27
  25. 27
  26. 90
  27. 297
  28. 3861
  29. 72
  30. 99
  31. 3234
  32. 27
  33. 232
  34. 348
  35. 3332
  36. 245
  37. 441
  38. 63
  39. 441
  40. 228

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